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INVENTORIES (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
At FIFO or average cost (approximates current cost) [Abstract] |  |
Finished goods | $ 1,114 | $ 1,143
Work in process | 220 | 262
Raw materials and supplies | 576 | 515
Total inventories at FIFO or average cost | 1,910 | 1,920
Less: LIFO reserve | 248 | 337
Total inventories | $ 1,662 | $ 1,583
Inventories valued on the LIFO method (in hundredths) | 50.00% | 55.00%

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